Buffer.alloc(): uninitialized buffer with an incorrectly encoded fill value

[vic511]

• Version: 9.2.0
• Platform: Linux debian 4.9.0-3-amd64 deps: update openssl to 1.0.1j #1 SMP Debian 4.9.30-2 (2017-06-12) x86_64 GNU/Linux

Executing this script leads to buf being uninitialized.

let buf = Buffer.alloc(0x100, "This is not correctly encoded", "hex");
console.log(buf);

I highly suspect this is because Buffer.alloc() calls buffer.fill() after allocating memory, which doesn't fill the buffer when it cannot decode the value parameter.